Info on the MSD adjustable Rev Limiters:
http://www.msdignition.com/rpm_13.htm
And info on the Noise Reduction Capacitor. Note that it casually mentions that "A side benefit is that the Capacitor will protect the MSD Ignition from voltage spikes or current surges."
http://www.msdignition.com/pdf/tech%...adio_noise.pdf
.